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06-23-2012, 06:02 PM
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#1 |
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3" Exhaust
Join Date: Jun 2012
Location: az
Posts: 50
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i dont think it is fuel pressure. the plugs are dry sooty, and the fuel is going fast.
i changed the cps and same things. no boost leaks, i tested using the smoke trick and the soapy water while pressurizing the manifold. i am starting to really lean to the afm or the wiring to the ecu from the tps??????????????????????????????????????????????? ???????? |
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06-23-2012, 07:00 PM
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#2 |
 Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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Well, you can test the AFM to a degree as detailed in the TSRM. As for the TPS you should. Test the voltage at the VTA pin at the ECU. You should see around.5v up to about 4.8v as it the throttle is open and closed. It might be 3.8v on the high side, I can't recall at the moment.
Are you certain you don't have a knock?
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06-24-2012, 02:48 AM
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#3 |
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3" Exhaust
Join Date: Jun 2012
Location: az
Posts: 50
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i dont think i do? i cant hear one. but i would hate to think i might have one. i just rebuilt the motor.
the motor was left in the supra with the hood open and half taken apart when i bought it from the guy. i have fought wasp pupas in the vacuum lines and a mess of other things so it makes me question all of the electronics in the engine bay. since the original tps that came with the motor was bad... |
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06-24-2012, 04:45 AM
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#4 |
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3" Exhaust
Join Date: Jun 2012
Location: az
Posts: 50
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even if it was knocking it would not explain the cracked throttle and accelerating.
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06-25-2012, 10:19 PM
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#5 |
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Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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I didn't have a chance to really look this over before. A couple things I'd look at are the fuel pump relay and resistor pack, try an alternate ECU, try an alternate AFM. Is the fuel pressure up VSV connected, functional and properly routed?
I didn't recognize a wideband in you gauge set there. If you have access to one log it or at least make a video so we can see what's going on when it bogs. Did you test the TPS signal at the ECU as I mentioned? What about the AFM (honestly I'd just try to borrow a known good one as I don't expect you have the equipment and documentation to test it copletely).
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar ---> |
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07-08-2012, 08:50 PM
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#6 |
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3" Exhaust
Join Date: Jun 2012
Location: az
Posts: 50
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bad wiring from the tps to the ecu. ran new wires from the tps to the afm/eng temp sensor and ecu. fixed the problem
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07-08-2012, 10:42 PM
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#7 |
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Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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Excellent. I'm glad you got it sorted out. Thanks for posting back with the final results.
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar ---> |
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